Core: Remove isolation level 3

Remove functions, process, data which only used in isolation level 3
for library model.

Change-Id: Ia21819d6a6cccb18af316a79658aa3673f2d2420
Signed-off-by: Edison Ai <edison.ai@arm.com>
diff --git a/secure_fw/spm/spm_api_ipc.c b/secure_fw/spm/spm_api_ipc.c
index 6443b52..98f6046 100644
--- a/secure_fw/spm/spm_api_ipc.c
+++ b/secure_fw/spm/spm_api_ipc.c
@@ -410,7 +410,17 @@
     return IPC_SUCCESS;
 }
 
-/* SPM extend functions */
+uint32_t tfm_spm_partition_get_stack_bottom(uint32_t partition_idx)
+{
+    return g_spm_partition_db.partitions[partition_idx].
+            memory_data.stack_bottom;
+}
+
+uint32_t tfm_spm_partition_get_stack_top(uint32_t partition_idx)
+{
+    return g_spm_partition_db.partitions[partition_idx].memory_data.stack_top;
+}
+
 uint32_t tfm_spm_partition_get_running_partition_id(void)
 {
     struct tfm_thrd_ctx *pth = tfm_thrd_curr_thread();